<div class="refentry" lang="en" xml:lang="en"><a id="glXQueryVersion"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glXQueryVersion — return the version numbers of the GLX extension</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">Bool <b class="fsfunc">glXQueryVersion</b>(</code></td><td>Display *  </td><td><var class="pdparam">dpy</var>, </td></tr><tr><td> </td><td>int *  </td><td><var class="pdparam">major</var>, </td></tr><tr><td> </td><td>int *  </td><td><var class="pdparam">minor</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dpy</code></em></span></dt><dd><p>
                    Specifies the connection to the X server.
                </p></dd><dt><span class="term"><em class="parameter"><code>major</code></em></span></dt><dd><p>
                    Returns the major version number of the GLX server extension.
                </p></dd><dt><span class="term"><em class="parameter"><code>minor</code></em></span></dt><dd><p>
                    Returns the minor version number of the GLX server extension.
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <code class="function">glXQueryVersion</code> returns the major and minor version numbers of the GLX extension
            implemented by the server associated with connection <em class="parameter"><code>dpy</code></em>.
            Implementations with the same major version number are upward compatible,
            meaning that the implementation with the higher minor number is a superset
            of the version with the lower minor number.
        </p><p>
            <em class="parameter"><code>major</code></em> and <em class="parameter"><code>minor</code></em> do not return values if they are specified as
            <code class="constant">NULL</code>.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
            <code class="function">glXQueryVersion</code> returns <code class="constant">False</code> if it fails,
            <code class="constant">True</code> otherwise.
        </p><p>
            <em class="parameter"><code>major</code></em> and <em class="parameter"><code>minor</code></em> are not updated when <code class="constant">False</code> is returned.
        </p></div>
        {$pipelinestall}{$examples}
        <div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a class="citerefentry" href="glXQueryExtension"><span class="citerefentry"><span class="refentrytitle">glXQueryExtension</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><div id="Copyright"><h2>Copyright</h2><p>
            Copyright © 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
        </p></div></div></div>
